I don't see how this system could be legal. Article 10.2.3 of the technical regulations clearly says:
"No adjustment may be made to any suspension system while the car is in motion."
DAS allows the driver to change the toe angle - part of the suspension geometry - while the car is in motion. As soon as one of the other teams lodges a complaint, this system will surely be outlawed
Well, it seems in F1 regs, it can justified by : they are just steering the wheels in one different extra Axis(there is no rule for that,grey area, and they can also [10.4.1] re aligned maximum two wheels's direction, this rule intention was to avoid 4 wheel steering but they are using it justify this! )! those moving parts and changeable parts are actually part of steering wheel not the suspension.
if you consider wheel's alignment part of the suspension just because the wheels are connected to suspension, you have to ban "brake bias adjustment during a session while a car is moving too "as the brakes literally connected to suspension arms! that's why they separated those things from suspension in their regs.
their argument again, is they are just steering the two front wheel in a new direction with a mechanical system ,none electronic powered and non hydraulic , as the rule said it shouldn't use them. the rules never mentioned that you can't steer the front wheel in a new axis! that was the loophole!
people shouldn't just read 10.2.3 and say it's illegal before they know what can be part of suspension in "F1" (i'm not talking about your road car or GT cars or nascar and such, only in F1 rules)or not just because it makes sense in other cars.
another example, when you steer the wheel normally the front wheels's toe (and also some other alignments)changes to a degree, is it allowed to steer or not? does it change the toe when you are moving or not? you can steer normally and the toe can changes because of it while you are in a moving car, so steering in other axises is not illegal and changing toe as the result of steering is not illegal, also even for steering normally you are changing the suspension, the suspension arms have to move to steer the frontwheels, is that illegal because we are moving/changing the arms? that's why they kept those parts as parts of steering system not the suspension. in their argument that "we just steering the front wheels in a new axis and the toe changes with it too, like steering the wheels in normal way". they are Lawgineers not mortal lawyers or engineers
*also other example of F1 innovation that the fans thought it's illegal just because in regs there was this at 2018 and 2019: in the area of Side mirrors you can not use aero and air flow devices(wings winglets), the teams said "oh our mirror it's not secure for safety sake(or we can not put the mirror there without using extra arms and such)we have to use 2 arm to keep it together and look those arms have weird shapes and it seems its side effect is a little aero gain! and they are legal, mercedes 2019 and redbull/ferrari 2020
*about complaints, if something couldn't be disallowed by current regs, the teams have to vote about it being a major exploit/loophole that is Dangerous for F1 future, good luck to them to get the major vote to make it illegal, because in 2021 it is disallowed from the start of its regs, that's why mercedes bring it to this season as their last bullet tor 2020.